It doesn’t need to be.
Coloring, which is often added to farm-raised salmon through diet, is meant to give consumers the illusion that the salmon they are buying is wild-caught.
Wild salmon are carnivorous and ingest krill and other shellfish whose color turns salmon flesh dark pink. Farm-raised salmon are, in contrast, often fed processed fish meal, fish oil, vegetable proteins, animal by-products and even genetically modified soy. Chemical additives, canthaxanthin and astaxanthin, must be included in this mixture of fish feed in order to produce the familiar salmon flesh color.
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